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Four Seasons 73420 HVAC Blend Door Actuator - Left Main
| Brand | Four Seasons 73420 |
|---|---|
| Position | Left Main |
| Door Linkage | Arm |
| Mounting Ear Qty. | 4 |
| Style | HVAC Air Door Actuator |
| Terminal Pin Qty. | 5 |
| Product line | Air Door Actuator |
| Fits | Cadillac · 18 vehicles |
Air door actuator. Controls HVAC airflow with a 5-pin electrical connection.
Arm linkage. Uses an arm-style linkage for smooth door movement.
4 mounting ears. Provides a secure, stable installation.
Cross-references Four Seasons 73420, 604316 and 22799392 for the same application. See all 5.
Four Seasons 73420 HVAC Air Door Actuator
The Four Seasons 73420 HVAC blend door actuator is a direct-fit air door actuator for vehicles with automatic temperature control. It uses a 5-pin terminal layout, an arm-style door linkage, and a 4-ear mounting design to control airflow inside the HVAC case. This part is built for 2013-2015 Cadillac ATS and 2014-2015 Cadillac CTS applications at the left main position.
Key Features
- Brand: Four Seasons Air Door Actuator line
- Part number: 73420
- HVAC blend door actuator for interior air distribution control
- Arm-style door linkage for the specified HVAC door setup
- 4 mounting ears for secure installation
- 5-terminal pin configuration
- Fits Cadillac ATS and Cadillac CTS models with ATC-equipped HVAC systems
Product Details
Four Seasons 73420 is an HVAC air door actuator used to move the blend door inside the climate control housing. In 2013-2015 Cadillac ATS and 2014-2015 Cadillac CTS vehicles, the left main actuator helps regulate how heated and cooled air is directed through the cabin. This part cross-references 604316 and 22799392 for the same application. If you are searching for a Cadillac ATS blend door actuator or a Cadillac CTS HVAC air door actuator, this part number provides a fitment-specific replacement option.
Common Problems This Part Can Address
- Temperature changes that do not respond correctly to HVAC controls
- Airflow stuck on one vent setting or one cabin zone
- Clicking or ticking noises from the dash HVAC case
- Blend door movement issues in ATC-equipped systems
- Loss of proper left main air distribution in the cabin
Installation Notes and Tips
Verify the original actuator style, terminal count, mounting ear layout, and left main position before installation. This part is specified for Cadillac ATS and Cadillac CTS vehicles with automatic temperature control, so confirm the HVAC system configuration matches the listed fitment. After installation, cycle the climate controls to allow the actuator to relearn its position and confirm smooth door movement.
Quality Assurance
Four Seasons HVAC components are cataloged for application-specific replacement, and the 73420 actuator is listed with confirmed vehicle fitment for the models shown above. Use the part number 73420 and the vehicle-specific fitment details to verify the correct replacement before ordering.
| Year | Make | Model | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2015 | Cadillac | ATS | — | — | — | Left Main | Air Door Actuator |
| 2015 | Cadillac | CTS | — | 2.0L | L4 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2015 | Cadillac | CTS | Sedan | 2.0L | L4 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2015 | Cadillac | CTS | — | 3.6L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2015 | Cadillac | CTS | Sedan | 3.6L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | ATS | — | — | — | Left Main | Air Door Actuator |
| 2014 | Cadillac | CTS | Sedan | 2.0L | L4 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Wagon | 2.0L | L4 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Coupe | 2.0L | L4 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Sedan | 3.0L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Wagon | 3.0L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Sedan | 3.6L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Wagon | 3.6L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Coupe | 3.6L | V6 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Sedan | 6.2L | V8 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Wagon | 6.2L | V8 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2014 | Cadillac | CTS | Coupe | 6.2L | V8 | Left Main | Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Air Door Actuator |
| 2013 | Cadillac | ATS | — | — | — | Left Main | Air Door Actuator |
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